Verizon has reported its quarterly results with strong revenue and customer growth for both wireless and FiOS services. In fourth-quarter 2012, Verizon Wireless delivered the highest number of retail postpaid net additions of any quarter in its history, strong growth in revenues, an increase in smartphone penetration, and continued low retail postpaid churn. That means 8.5 percent year-over-year increase in service revenues in 4Q 2012; 8.4 percent year-over-year increase in retail service revenues; 2.2 million retail net additions, excluding acquisitions and adjustments, including a record-high 2.1 million retail postpaid net connections; low retail postpaid churn of 0.95 percent; 98.2 million total retail connections, 92.5 million total retail postpaid connections; and 4G LTE service now available to more than 273 million people in 476 markets across the U.S. Here are more details on Verizon wireless business during Q4 2012:

Wireless Financial Highlights

Total revenues were $20.0 billion in fourth-quarter 2012, up 9.5 percent year over year. Service revenues in the quarter totaled $16.4 billion, up 8.5 percent year over year. Retail service revenues grew 8.4 percent year over year, to $15.8 billion.

For full-year 2012, total revenues were $75.9 billion, up 8.1 percent over full-year 2011, and service revenues were $63.7 billion in 2012, up 7.7 percent year over year.

Retail postpaid ARPA (average revenue per account) grew 6.6 percent over fourth-quarter 2011, to $146.80 per month. As customers continue to add multiple devices to accounts following the introduction of the Share Everything Plan in June, Verizon Wireless now reports ARPA instead of ARPU since customers can share data among multiple devices.

In fourth-quarter 2012, wireless operating income margin was 24.0 percent and segment EBITDA margin on service revenues (non-GAAP) was 41.4 percent, down 80 basis points from fourth-quarter 2011. For full-year 2012, operating income margin was 28.7 percent, up 230 basis points from full-year 2011; segment EBITDA margin was 46.6 percent, up 180 basis points year over year.

Wireless Operational Highlights

Verizon Wireless added 2.2 million net retail connections in the fourth quarter, including a record-high 2.1 million retail postpaid net connections. The company added 5.0 million net retail postpaid connections in 2012, the most in four years. These additions exclude acquisitions and adjustments.

At the end of 2012, the company had 98.2 million retail connections, a 6.6 percent increase year over year -- including 92.5 million retail postpaid connections.

Verizon Wireless had 35.1 million retail postpaid accounts at the end of the fourth quarter, a 1.4 percent increase over the fourth quarter 2011, and an average of 2.6 connections per account, up 4.3 percent year over year.

At year-end 2012, smartphones accounted for more than 58 percent of the Verizon Wireless retail postpaid customer phone base, up from 53 percent at the end of third-quarter 2012.

Retail postpaid churn was 0.95 percent in the fourth quarter and retail churn was 1.24 percent, both up 1 basis point year over year.

Verizon Wireless continued to roll out its 4G LTE mobile broadband network, the largest 4G LTE network in the U.S. As of today (Jan. 22), Verizon Wireless 4G LTE service is available to more than 273 million people -- close to 89 percent of the population -- in 476 markets across the U.S.

Verizon Wireless announced it will begin offering shared data plans for business on Jan. 24, 2013, with the Share Everything Plan for Small Business and the Nationwide for Business Data Packages and Plans.